@misc{indiciaec3a55383c81a,
  title = {Mass spectrometer leak testing by a calibrated enclosure method.},
  author = {Hollinger, D. L. and Koch, E. F. and Manganaro, J. L.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690036985},
  note = {Source identifier: 19690036985}
}